Wow, thank you so much!! I'm so glad all of them were interesting to you! (also I'm SO glad you like Luca! When I first made him, I was worried people would think he's too vanilla or feel-good) <3
(answered the bulk of your question under the "view more" cut for others' sake even though it doesn't go into too much detail!)
As for your question, MC herself does not fall into a caretaker role outside of regular, run-of-the-mill kindness. She, more often than not, is the one being looked after rather than looking after others. Our MC here is a bit too nosy for her own good, so the others are more careful about what they do and tend to keep her under lock and key. She doesn't like that much. ^^;
There are two alternative endings for two characters where the MC embraces the lifestyle and joins it, one route where she learns a bit of self defense, and one route where she learns as much as she can -- and if she's not fully prepared she will get a bad end regardless of any affection points earned with that character.
Hopefully that helps! If it doesn't sound like your cup of tea, no worries at all! Once again, thank you so much for playing! ^^